CN108754198A - Preparation method of flexible block metal glass - Google Patents
Preparation method of flexible block metal glass Download PDFInfo
- Publication number
- CN108754198A CN108754198A CN201810517266.1A CN201810517266A CN108754198A CN 108754198 A CN108754198 A CN 108754198A CN 201810517266 A CN201810517266 A CN 201810517266A CN 108754198 A CN108754198 A CN 108754198A
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 46
- 239000002184 metal Substances 0.000 title claims abstract description 46
- 239000011521 glass Substances 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 62
- 239000010453 quartz Substances 0.000 claims abstract description 57
- 239000000956 alloy Substances 0.000 claims abstract description 34
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 33
- 230000001681 protective effect Effects 0.000 claims abstract description 19
- 238000000746 purification Methods 0.000 claims abstract description 15
- 238000003723 Smelting Methods 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000007789 gas Substances 0.000 claims description 35
- 239000003708 ampul Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000005275 alloying Methods 0.000 claims description 3
- 230000000994 depressogenic effect Effects 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000005201 scrubbing Methods 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 239000005300 metallic glass Substances 0.000 abstract description 18
- 230000006835 compression Effects 0.000 abstract description 5
- 238000007906 compression Methods 0.000 abstract description 5
- 238000003825 pressing Methods 0.000 abstract 1
- 238000010791 quenching Methods 0.000 abstract 1
- 230000000171 quenching effect Effects 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 17
- 230000035882 stress Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 238000007796 conventional method Methods 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000011068 loading method Methods 0.000 description 3
- 238000013001 point bending Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000011324 bead Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 210000005239 tubule Anatomy 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 206010020751 Hypersensitivity Diseases 0.000 description 1
- 229910000808 amorphous metal alloy Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006353 environmental stress Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000000075 oxide glass Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 239000011863 silicon-based powder Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/11—Making amorphous alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/003—Making ferrous alloys making amorphous alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master alloys
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Glass Compositions (AREA)
Abstract
The invention discloses a preparation method of flexible block metal glass, which comprises the following steps: step one, putting all raw materials into dry smelting equipment according to alloy components of bulk metallic glass; repeatedly smelting the raw materials in the presence of protective gas to prepare a master alloy ingot; step two, purifying the master alloy ingot obtained in the step one by taking an oxide as a purification medium; step three, heating quartz to a molten state to prepare a quartz mold; step four, after the quartz mould is sealed, placing the purified master alloy ingot in the quartz mould, heating the master alloy ingot to be molten in the presence of protective gas, pressing the molten metal into the quartz mould by utilizing air pressure, enabling the molten metal to be uniform and to fill the quartz mould, taking out the quartz mould and immediately putting the quartz mould into cold water for quenching, and thus obtaining the flexible bulk metallic glass. The invention greatly improves the compression plasticity of the bulk metallic glass, and leads the metallic glass to be flexibly bent without breaking under the room temperature condition.
Description
Technical field
The present invention relates to a kind of preparation methods of flexible block metal glass.
Background technology
With the development of flexible electronic device, the requirement to material comprehensive performance is higher and higher, and material has both been required to have height
The performances such as intensity, wear resistant corrosion resistant also require material to be bent at room temperature not broken, to meet flexible device freely deformable
It is required that.Most of traditional materials are difficult to be competent at.Glassy metal is that a kind of atomic arrangement does not have three dimensional periodic structure, but several
Still the novel metastable state amorphous alloy material of certain ordered is showed within the scope of a atomic distance.This kind of glass is different from
Conventional oxide glass, there are metallic bond combinations between atom, have certain conductive capability；Unique structure makes it have height
Many excellent physical and chemical performances such as intensity, wear-resisting, corrosion-resistant, excellent soft magnet performance are passed in ultraprecise machinery, hypersensitive
The fields such as sensor, ultra-low loss iron core, electronic device, aerospace, military and national defense have wide practical use.However, this kind of
The fatal weakness of material is just a lack of macroscopical temperature-room type plasticity deformability, and most glassy metal room temperature compression plastic strains are small
In 2%, more especially contain the iron based metallic glass of rare earth element, is typical fragile material, before not up to surrendering just
Calamitous fracture can occur；Only a few metals glass has certain room temperature compression plasticity.Up to the present, glassy metal
There are filament or strip in micro-scaled range that can be bent at ambient temperature without being broken, block metal glass is not
With larger room temperature flexural ability, the application of glassy metal is constrained significantly.Just there is an urgent need to material science personnel preparations for this
Block metal glass flexible breaks through the bottleneck for restricting glassy metal development and application, pushes the extensive of block metal glass
Using and development.
Invention content
The object of the present invention is to provide a kind of preparation methods of flexible block metal glass, design and introduce gradient remnants and answer
Power, change loading environment under stress distribution, hinder shear band extension, with overcome existing block metal glass it is crisp, cannot be in room
The weakness of random flexural deformation under temperature.
To achieve the above object, the technical solution adopted by the present invention is：
A kind of preparation method of flexibility block metal glass, includes the following steps：
Step 1, the preparation of master alloy ingot：According to the alloying component of block metal glass, matter is converted by atomic percent
Percentage is measured, each raw material is weighed, is then put into each raw material in dry smelting equipment；Smelting equipment is vacuumized into simultaneously gas washing；
Finally in the presence of protective gas, master alloy ingot will be prepared into after each raw material melt back；
Step 2, the purification of master alloy ingot：Using oxide as purification medium, purification medium is placed on the quartz sealed
It after being vacuumized in pipe, is placed in high temperature furnace and heats, medium to be purified is completely melt transparent, opening quartz ampoule, by step 1
Obtained master alloy ingot is put into purification medium, and at least 4 hours are kept the temperature in 1250 DEG C of temperature or more；
Step 3, the preparation of quartz molds：By quartz heating to molten condition, to obtained quartzy melt uniform load,
Quartz is elongated to corresponding shape by the form of the flexible block metal glass prepared as needed, obtain wall thickness be 0.2~
The quartz molds of 0.5mm keep quartz molds dimensionally stable, leave heating zone, make quartz molds natural cooling to get to quartz
Mold；
Master alloy ingot after step 2 purifies is placed on by step 4 after quartz molds sealing prepared by step 3
After in quartz molds, using method identical with step 1 vacuumize and after gas washing, in the presence of protective gas, heat
Then master alloy ingot vacuumizes removal protective gas, is re-filled with protective gas, molten metal is depressed into stone using air pressure to melting
After in heroes and models' tool, the quartz molds containing molten metal are placed in high temperature furnace keep the temperature immediately, made molten metal uniformly and be full of
Quartz molds then take out and are immediately placed in cold quenching-in water, to obtain flexible block metal glass.
Further, the protective gas is the mixing of one or more of argon gas, nitrogen；The purity of protective gas
It is more than 98% for percent by volume.
Further, in the step 1, the vacuum degree after smelting equipment vacuumizes is more than or equal to 30Pa.
Further, in the step 1, smelting equipment is vacuumized and the process of gas washing is：Smelting equipment is taken out true
Sky is filled with protective gas into smelting equipment, vacuumizes again；Gas scrubbing carries out 4-5 times.
Further, in the step 2, by B2O3With CaO according to mass ratio 3：1 mixing, as purification medium.
Further, in the step 2, in insulating process, quartz ampoule is taken out from high temperature furnace at interval of half an hour, sees mother
Alloy pig crosses cool time from be fetched into recalescence, when cool time reach maximum value and when keeping stablizing, be filled with into quartz ampoule
Less than the protective gas of an atmospheric pressure, quartz ampoule is quenched, takes out master alloy ingot, with drying after alcohol washes.
Further, in the step 3, the form of flexible block metal glass is rodlike or plate.
Advantageous effect：The invention proposition is deposited from inside to outside using alloy melt during block metal glass rapid cooling
In temperature gradient, lead to inside alloy that there are non-uniform stress gradients, this stress gradient can make block under loading environment
Stress redistribution inside body glassy metal, hinders the extension of glassy metal internal shear band under loading environment, substantially improves
The compression plasticity of block metal glass, allow glassy metal at ambient temperature flexible bending and it is not broken.This is to metal glass
The fields such as rectifier, wearable device, strain gauge, robot accessory, flexible display, computor-keyboard, the mobile phone of glass have
It is widely applied.
Description of the drawings
Fig. 1 is the schematic cross-section of thin-walled quartz molds；
Fig. 2 is the stress distribution schematic diagram in block metal glass prepared by embodiment；
Fig. 3 is the based bulk metallic glasses structure that embodiment obtains and thermodynamic property distribution；
Fig. 4 is the stress moulded using traditional copper in the sample that Preparation Method is prepared and hardness is distributed and the present invention prepares sample
The comparison of product；
Fig. 5 is the Fe prepared through the invention74Mo5P13C7The three-point bending test result of glassy metal and conventional method
Compare；
Fig. 6 is Fe prepared by the present invention74Mo5P13C7Block metal glass difference ratio of height to diameter 1：1 and 2：Compressive Mechanical when 1
The comparison for the sample that performance is prepared with conventional method.
Specific implementation mode
The present invention is further described with reference to specific embodiment.
Embodiment
The preparation method of the flexible iron base block metal glass sample of the present embodiment, includes the following steps：
(1) preparation of master alloy ingot：According to atomic percent, the chemical formula of master alloy ingot is Fe80-x(Co, Ni, Cr, Mo)x
(P,B)y(C,Si)z Nbm, wherein y+z+m=20；The raw material for preparing above-mentioned master alloy ingot is：Fe particles (purity 99.98%),
Ni particles (purity 99.7%), Fe3P powder (purity 99.9%), Cr powder (purity 99.9%), Co powder (purity 99.9%), Mo
Powder (purity 99.9%), Nb particles (purity 99.9%), B particles (purity 99.9%), Si powder (purity 99.99%) and graphite powder
(purity 99.9995%).According to the alloying component set in proportion in precision as 10-5Claim on the electronic balance of g after each raw material,
Each raw material is put into the quartz glass tube of drying washed in advance, will be vacuumized in quartz glass tube insert experiment device, stone
Vacuum degree in English glass tube is 30Pa；It is filled with high-purity Ar gas into quartz glass tube, vacuumizes again, such gas scrubbing
It carries out 4-5 times；Finally, the Ar gas that 0.85atm is passed through into quartz glass tube does protective gas, utilizes high temperature firelock heated quartz
Each raw material of bottom of the tube, permeate a liquid metal bead after each raw material heating fusing.It, will after whole elements incorporate bead
Quartz glass tube quenches in cold water, obtains master alloy ingot.
(2) purification of master alloy ingot：By B2O3With CaO according to mass ratio 3：1 mixing, the purification medium mixed is placed
It is vacuumized in the quartz ampoule sealed after ten minutes, is placed in high temperature furnace and heats, medium to be purified is completely melt transparent, beats
Quartz ampoule is opened, the master alloy ingot synthesized before is put into purification medium, in 1250 DEG C of temperature or more heat preservation 4 hours or more.This
During a, quartz ampoule is taken out from high temperature furnace at interval of half an hour, seeing master alloy ingot, oneself is fetched into the cool time excessively of recalescence, waits for
When cool time reaches maximum value and keeps stablizing, it is filled with the Ar gas for being slightly less than an atmospheric pressure into quartz ampoule, quartz ampoule is quenched
Fire takes out master alloy ingot, is dried with after alcohol washes, for future use.
(3) preparation of flexible iron base block metal glass：Carry out example using thin-walled quartz ampoule as mold, by 1 centimetre of diameter, wall
It is uniform at quartz ampoule both ends after thick 1 millimeter of quartz ampoule is heated to molten condition by Bench burners114/1PSL firelocks
Quartz ampoule elongation is referred to required length by load, it keeps quartz ampoule both ends relative position to fix, leaves firelock high-temperature region, make quartz
Pipe natural cooling to get to thin-walled quartz pipe mold, mold sections as shown in Figure 1, the wall thickness of thin-walled quartz pipe mold be 0.2~
0.5mm.After one end closure of thin-walled quartz pipe mold, the master alloy ingot after purification is placed in thin-walled quartz pipe mold and is followed by
Enter experimental system, after vacuumize simultaneously gas washing using the identical method with step (1), under the protection of the Ar gas of 0.85atm,
With firelock heating alloy to melting, 10s removal protection gas is then vacuumized, then molten metal ball is got lodged in into tubule port, filled
Enter Ar gas, after molten metal is depressed into dumbbell shaped tubule using air pressure, quartz ampoule is placed in high temperature furnace keeps the temperature immediately, about 1
It is taken out after minute and is immediately placed in cold quenching-in water, to obtain flexible iron base block metal glass sample.
This example is with Fe74Mo5P13C7For, obtained based bulk metallic glasses structure and thermodynamics distribution can be such as figure
Shown in 3, compared simultaneously with the sample that conventional method is prepared in figure.It is non-to show that the iron-base block alloy prepared has
Crystal structure.
Fig. 4 gives the stress in the sample prepared using traditional copper molding Preparation Method and hardness is distributed and the present invention makes
The comparison of standby sample.As it can be seen that the section stress of based bulk metallic glasses prepared by the present invention is significantly greater than the preparation of traditional copper mould
Sample, stress is parabolically distributed, as shown in Figure 2.
Fig. 5 is the Fe prepared through the invention74Mo5P13C7The three-point bending test result of glassy metal and conventional method
Compare, there is the ability that is preferably badly deformed during three-point bending test of the invention, it at room temperature can be as film
Bending has good flexibility.
Fig. 6 compares Fe prepared by the present invention74Mo5P13C7Block metal glass difference ratio of height to diameter 1：1 and 2：Compression when 1
The comparison for the sample that mechanical property is prepared with conventional method.As it can be seen that block metal glass prepared by the present invention is with very high
Compressive plastic deformation ability.
The above is only a preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (7)
1. a kind of preparation method of flexibility block metal glass, it is characterised in that：Include the following steps：
Step 1, the preparation of master alloy ingot：According to the alloying component of block metal glass, quality hundred is converted by atomic percent
Divide ratio, weighs each raw material, be then put into each raw material in dry smelting equipment；Smelting equipment is vacuumized into simultaneously gas washing；Finally
In the presence of protective gas, master alloy ingot will be prepared into after each raw material melt back；
Step 2, the purification of master alloy ingot：Using oxide as purification medium, purification medium is placed in the quartz ampoule sealed
After vacuumizing, be placed in high temperature furnace and heat, medium to be purified be completely melt it is transparent, open quartz ampoule, step 1 is obtained
Master alloy ingot be put into purification medium, keep the temperature at least 4 hours in 1250 DEG C of temperature or more；
Step 3, the preparation of quartz molds：By quartz heating to molten condition, to obtained quartzy melt uniform load, according to
The form for needing flexible block metal glass to be prepared, corresponding shape is elongated to by quartz, and it is 0.2~0.5mm to obtain wall thickness
Quartz molds, keep quartz molds dimensionally stable, leave heating zone, make quartz molds natural cooling to get to quartz molds；
Master alloy ingot after step 2 purifies is placed on quartz by step 4 after quartz molds sealing prepared by step 3
After in mold, using method identical with step 1 vacuumize and after gas washing, in the presence of protective gas, heat female close
Then ingot vacuumizes removal protective gas, is re-filled with protective gas, molten metal is depressed into quartzy mould using air pressure to melting
After in tool, the quartz molds containing molten metal are placed in high temperature furnace keep the temperature immediately, makes molten metal uniformly and full of quartz
Mold then takes out and is immediately placed in cold quenching-in water, to obtain flexible block metal glass.
2. the preparation method of flexibility block metal glass according to claim 1, it is characterised in that：The protective gas is
The mixing of one or more of argon gas, nitrogen；The purity of protective gas is that percent by volume is more than 98%.
3. the preparation method of flexibility block metal glass according to claim 1, it is characterised in that：In the step 1,
Vacuum degree after smelting equipment vacuumizes is more than or equal to 30Pa.
4. the preparation method of flexibility block metal glass according to claim 1, it is characterised in that：In the step 1,
Smelting equipment is vacuumized and the process of gas washing is：Smelting equipment is vacuumized, protective gas is filled with into smelting equipment, again
It vacuumizes；Gas scrubbing carries out 4-5 times.
5. the preparation method of flexibility block metal glass according to claim 1, it is characterised in that：In the step 2,
By B2O3With CaO according to mass ratio 3：1 mixing, as purification medium.
6. the preparation method of flexibility block metal glass according to claim 1, it is characterised in that：In the step 2,
In insulating process, quartz ampoule is taken out from high temperature furnace at interval of half an hour, seeing master alloy ingot, oneself is fetched into the cool time excessively of recalescence, waits for
When crossing cool time and reaching maximum value and keep stablizing, the protective gas less than an atmospheric pressure is filled with into quartz ampoule, it will be quartzy
Pipe quenches, and takes out master alloy ingot, with drying after alcohol washes.
7. the preparation method of flexibility block metal glass according to claim 1, it is characterised in that：In the step 3,
The form of flexible block metal glass is rodlike or plate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810517266.1A CN108754198B (en) | 2018-05-25 | 2018-05-25 | Preparation method of flexible block metal glass |
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| CN201810517266.1A CN108754198B (en) | 2018-05-25 | 2018-05-25 | Preparation method of flexible block metal glass |
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| CN108754198B CN108754198B (en) | 2019-12-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109786338A (en) * | 2019-01-21 | 2019-05-21 | 盘星新型合金材料(常州)有限公司 | A kind of amorphous alloy flexible base board |
| CN111304557A (en) * | 2020-03-20 | 2020-06-19 | 西安交通大学 | Metal glass metamaterial with fold structure |
| CN114082902A (en) * | 2021-11-26 | 2022-02-25 | 紫金铜业有限公司 | Method and device for removing impurities from molten gold liquid |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11879569B2 (en) * | 2021-07-12 | 2024-01-23 | Supercool Metals LLC | Flexible bulk metallic glass elements |
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| CN101089212A (en) * | 2006-06-14 | 2007-12-19 | 南京理工大学 | Method for branch crystal balling in large block metal glass composite |
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| CN114082902A (en) * | 2021-11-26 | 2022-02-25 | 紫金铜业有限公司 | Method and device for removing impurities from molten gold liquid |
Also Published As
| Publication number | Publication date |
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| CN108754198B (en) | 2019-12-20 |
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